Asymptotic expressions are derived for the dyadic Green's functions of antennas radiating in the presence of a multilayered cylinder, where analytic representation of the asymptotic expansion coefficients eliminates the computational cost of numerical evaluation. As a result, the asymptotic extraction technique has been applied only once for a large summation order $n$. In addition, the Hankel function singularity encountered for source and evaluation points at the same radius has been eliminated using analytical integration.udud
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机译:推导了存在多层圆柱体时天线的二进格林函数的渐近表达式,其中渐进膨胀系数的解析表示消除了数值评估的计算成本。结果,渐进提取技术仅对大的求和阶$ n $应用了一次。此外,使用解析积分消除了相同半径处的源点和评估点遇到的汉克尔函数奇点。
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